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Note 7 - Long-term Debt - Maximum Total Leverage Ratio (Details) - Bank Credit Facility [Member] | Dec. 31, 2020
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Four Fiscal Quarters Ended March 31, 2019 through December 31, 2019 [Member] |
Maximum total leverage ratio | 6.00
Four Fiscal Quarters Ended March 31, 2021 [Member] |
Maximum total leverage ratio | 5.75
Four Fiscal Quarters Ended June 30, 2021 through December 31, 2021[Member] |
Maximum total leverage ratio | 7.75
Four Fiscal Quarters Ended March 31, 2022 [Member] |
Maximum total leverage ratio | 7.00
Four Fiscal Quarters Ended June 30, 2022 [Member] |
Maximum total leverage ratio | 6.75
Four Fiscal Quarters Ended September 30, 2022 [Member] |
Maximum total leverage ratio | 6.50
Four Fiscal Quarters Ended December 31, 2022 [Member] |
Maximum total leverage ratio | 6.00
Four Fiscal Quarters Ended March 31, 2023 and Thereafter [Member] |
Maximum total leverage ratio | 5.50

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- Definition The maximum total leverage ratio allowed under the covenant terms of the line of credit facility. + References No definition available. + Details
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